Venango Formation

Light-gray siltstone interbedded with some flaggy, gray sandstone and some bluish-gray shale; Panama Conglomerate and Woodcock Sandstone are, respectively, the lower and upper key beds defining the formation; referred to as "Cattaraugus" by some workers; includes some red shales where it interfingers to the east and south with the Catskill Formation; marine fossils present.
State Pennsylvania
Name Venango Formation
Geologic age Devonian
Lithologic constituents
Major
Sedimentary > Clastic > Conglomerate (Bed)Panama Conglomerate and Woodcock Sandstone are, respectively, the lower and upper key beds defining the formation
Sedimentary > Clastic > Siltstone (Bed)
Minor
Sedimentary > Clastic > Sandstone (Bed)some flaggy, gray sandstone; Panama Conglomerate and Woodcock Sandstone are, respectively, the lower and upper key beds defining the formation
Sedimentary > Clastic > Mudstone > Shale (Bed)some bluish-gray shale; includes some red shales where it interfingers to the east and south with the Catskill Formation; marine fossils present.
References

Berg, T.M., Edmunds, W.E., Geyer, A.R., and others, compilers, 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey, 4th ser., Map 1, 2nd ed., 3 sheets, scale 1:250,000.

Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, Miles, C.E., and Whitfield, T.G., compilers, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map, scale 1:250,000.

NGMDB product
Counties Crawford - Erie - Forest - McKean - Warren